2000 200 hp. NO oil warning. Buzzer and dash light. Checked oil is in the tank. Checked oil primer ball was hard. Disconnedted oil line from oil tank to oil lift pump and squeezed oil primer bulb... oil came out. I replaced the oil lift pump. Same problem. I diconeccted the return line and started the engine. Oil squirts out. How much?? Filled the bottom of a water bottle about 1/2" in 2-3 seconds. [ should have done this first ] I disconnected the oil pressure sensor hook up an ohm meter. It reads 0 ohms with engine off. Start engine goes to infinite [ open ] ohms almost instantly [should have done this first! ] re-connected the oil sensor wire. With EV Diagnostic software hooked up with engine off in 'monitor/ mode oil pressure okay. Start engine and after a few seconds the oil pressure warning comes on. WTF?? I replaced the oil injector assembly with a brand new OEM unit $350... only because I had happen to have this in stock. Didn't think it would make any change and of course did not. I also had a back up EMM. I copied over the injector data ... started the engine. SAME PROBLEM!! No oil alarm. I bought a brand new oil pick up assenbly and connected to he harness and set it upside down so it would read full. Just testing the low oil sending in the oil tank here. Same problem. So... I am at a total loss. Only thing I know to try is to actually install the actual oil pick up assemble ad primer hose... it sure doesn't seem plugged as I can pump oil out the other side by hand... but perhaps there is just enough of a restriction to cause an issue? I took it out screen looked okay. The real stumpier is the oil pressure sender on the lift pump seems indicate it sees pressure andntells the EMM that and YET,,, I get the low oil pressure on the software. Two codes... lift pump not primed and Low oil pressure ... if anybody has any ideas I would SURE appriciate it. I don't know what else to look for. Makes no sense. no sense. oh... codes are 39 oil pressure switch no prime and 38 Oil pressure switch NO PRESSURE [ I can't read the rest... I think from searching it's can't detect pulses ] Oil injector is clicking when I do the oil injector static tect .. but oddly no oil coming out in throttle body??? hmmm Clue??
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